Process for producing mosaic or marble paper.



UNITED STATES PATENT OFFICE.

FRITZ WITTSTOCK, OF-BERLIN, GERMANY. {RECESS FOR PRODUCING MOSAIC D RMARBLE PAPER.

No. 915,145; Specification of Letters Patent. Patented March 16, 1909.

Application flied March 5, 1906. .Serial No. 304,336.

To all whom it may concern: .1 plate and exposing same without interrup--Be it knownthatI, FRITZ WITTSTOOK, a tion, he'necessary-time to theeffect of light, subject of the Em eror of Germany, residing the finalresult will be, a simple structure of at Schonhauser Alllee 84, Berlin,N in the lines either in a horizontal or vertical 'direc- 60 Empire ofGermany, have invented a certion, which depends on the position of thetain new and Improved Process for Pro- I grain plate placed inside thecamera, while, ducing Mosaic or Marble Paper, (Fancy I when exposingJvith double grain plates, Paper) of which the following is a specificalentirely white spots will be shown with a tion. remarkable distinctness,which is expressed 65' The production of variegated paper whlch verystrongly in papers having one and sev- 18 used especially bybook-binders and carderal colors. It 1s impossible to mark any boardmakers was hitherto effected in such 1 difference intint through a larer or smaller a manner, that; color was a plied by means grain plate. Bya plying t e chemicalof a brush upon a gelatin-plhte. Hereu on physicalprocess and making only one ex- 70 .3 the single sheets to be printedwith co ors posure with the simple rain plate, an object were ressedupon the gelatin plate, dried which contains White, ight-gray and blackand ally varnished. "The product obshades will change in thereproduction as tained in'this manner, may have answered follows: Whitewillrernain completely white, its purpose, but it .is not possible, toproduce light gray will result from the use of a fine 20 from a plate,which was prepared an awkgrain plate, dark grayfroni the use of a largerand any unlformity in a certain design re roduction o iii.

of light, small black spots are to be found.

Ward and diflicult manner, .an unlimited. grain plate and blackaccording to thein number of colored paper sheets and =moretensity ofblackspots in the original as such over, there would-be a diiference inthe patin the reproduction. tern varying from one sheet to the other Theasphalt rocess results in an inexact f the marble grain, results inwould be out of question. When a plying cult printing and when enlargingthe autotypy for this purpose, it will be impattern, no union of thedesign will be ospossible, to produce prints With entirely sible. Thechalk method is-extremely diffi- White spaces as even in the greatestintensity cult for making an imitation, gives any amount of trouble inprinting and an exact itherto two methods are known to carry connectionof the lines is out of question. that process into practical effect. TheBy engraving the pattern, it is impossible oldest of them is, that aglass-plate, upon to imitate any design in an exact manner. which isrovided a lass-network or grain In the practice of my process I may make35 late wit uniform orizontal or vertical. use of the above mentionedmethods, but

nes, is taken inv front of a ver sensitive in my process I produce theresult desired plate placed inside a photographic camera by the use of asingle lithograph stone or and exposed to the effect of ight half of theplate, and at one printing operation. time intended for exposure,whereupon the, In carrying out my process a grain plate 40 camera willbe closed and the grain plate is placed in. front of a sensitive plateof a 55 duced, by the old met b'rou ht into a different position. Whenthe photographic camera and a suitable object, first alf of the time forexposure has passed as for example, a marble plateor a Woven withhorizontal position of the grain-plate, fabric, is used for a design.The plate havthe second half will pass with vertical osimg been exposedthe necessary length of 45 tion of same. The result of this will. 6 atime will show an exact likeness of the depattern, formed of linescrossing each other. sign photographed, the likeness, however, A latermethod of this kind is to expose a being divided y the lines of thegrain plate glass plate upon which is laid a horizontal as Will beunderstood. The negative thus and vertical grain plate, to expose thesenproduced is prepared by photographic means 50 sitive late only oncefor the time required to be copied on paper as by the production to thef ht and the final result will be a patof an autotype plate from thenegative in tern of ines crossing each other. I the well known manner.Prints are then When applying autotypy and if for exmade fromtheautotype plate, difierent colors ample marble co ored paper is to beprobeing preferably used in making each print viz. by placing Thelmpressions on these prints are then a simple grain plate in front ofthe sensitive transferred to a lithograph stone or equivafinal printing,scraping ent co ors from the autotype plate will of means upon thenumber of colors required to produce the desired effect in the course,depend linished impression. The slight shifting of each print or printedsheets with respect to each other, in transferring their impressions oneabove the other to the stone or plate results in the production ofunexcelled marble pa er effects.

t is to be understood that,while I prefer to use different colored inksin making the prints or printed sheets, the invention may be practicedby printing with the same colored ink upon the prints or printed sheets,the slight shifting of the sheets, which constitutes the essentialfeatures of my inven tion, being done as hereinbefore described. Wherethe stone or late has applied thereto only ink of one co or, it isreinked in the usual way. When however, inks of different colors areapplied thereto, as hereinbefore described, the reinking. isaccomplished in the'same manner as that in which the first ink isapkplied. This has been hereinbefore' set fort It is to be understoodthat the original negative may be reproduced in diiierent colors uponthe separate prints or sheets by'any known methods and that in theproduction of the stone or plate to be used in the knives or other meansmay be employed to eflect corrections in the stone or p ate where thecolor is too heavy 'or the lines too close together and that weak spotsor arts showing linestoo far apart may be lled in with color bv of agelatin plate or screen, in accor ance with the present 'ractice in theart.

Having thus descri ed my invention, 1 claim:

1. The herein described process which con l sists' in photographing adesign through a grain 1 plate, reproducing said design upon separate[prints or sheets, transferring the diflerent impressions of the saidprints or sheets to a stone or plate, one impression being superimposedupon another, but each impression being shifted somewhat from exactcoincidence with adjacent impressions, and finally printing from saidstone or plate.

2. The herein described process which con- I sists in photographing adesign through a grain plate, producing an autotype from the negativethus made, producing separate impressions in different colors from saidautotype, superimposing said impressions one above the other, butsomewhat out of exact coincidence, upon a lithograph stone or analogousplate and finally printing from said stone or plate.

In testimony whereof I presence of two witnesses.

FRITZ WITTSTOCK.

afiix signature in Witnesses HENRY HASPER, CHARLOTTE BUSSLINGER.

